( XXI ) 
SUISSE. 
Berne. — JYaturforschende Gesellschaft. 
Société helvétique des sciences naturelles. 
Genève. — L'enseignement mathématique, directeurs : MM. Fehb 
et Laisant (rue Plantamour, 19). 
lîcuchàtel. — Société des sciences naturelles. 
Zurich. — JYaturforschende Gesellschaft. 
AMÉRIQUE. 
ÉTATS-UNIS. 
Austin. — Texas Academy of sciences. 
Baltimore. — American Journal of mathematics. (Johns ffopkins 
University. J 
Boston. — American Academy of arts and sciences. 
Society of nalural History. 
Cambridge (Mass.). — Muséum of comparative Zoology. 
Chicago. — Field Muséum of natural history. 
Cold Sprlng Harbor (N.Y.). — Carnegie Institution (station 
for expérimentale évolution; directeur : M C. B. Davenport). 
Colorado. — Colorado Collège (bureau des publications), 
Des Moines (lovva). — Geological Survey . 
Lawrence (Kan). — The Kansas University. 
MadSson. — Wisconsin Academy of sciences, letters and arts. 
Geological Survey. 
Mebraska. — University. 
New-Haven. — Conneclicut Academy o farts and sciences. 
New-York. — Academy of sciences. 
Muséum of nalural history. 
American Mathematical Society. 
l'hiladelphie. — Academy of natural sciences. 
American philosophical Society. 
Wagner free Institute of sciences. 
